#include <iostream>
using namespace std;
int main(int argc, char **argv[])
{
  double A, B, C;
  cout << "vvedite A i B:  ";
  cin >> A >> B;
  C = A;
  A = B;
  B = C;
  cout << "A = " << A << "\n B = " << B <<endl;
  return 0;
}
